what happens to a balloon that is sealed with air at a high altitude and taken down to sea level? why

Answer:

The Ray Population Increases

Explanation:

This happens because the great white eats bigger animals

Answer:

1.4L

Explanation:

You basically divide 20 divided by 1.5

Answer:

Explanation:

See attachment.

Decreasing the mass of the objects   No.  Force will change.

Increasing the temperature of the objects Yes,  No change in force (at most a very small change if the heat causes excessive expansion, reducing the distance, although 1/2 will be further apart)

Increasing the distance between the objects No.  Force will change.

Decreasing the distance between the objects  No.  Force will change.

Answer:

uhh

Explanation:

Impedance is a measure of the opposition to the flow of electrical current in a circuit. It is a complex quantity that includes both resistance and reactance, and is measured in ohms (Ω).

Impedance is an important concept in electrical engineering and is used to design and analyze electronic circuits, communication systems, and power systems.

We know that the capacitive reactance is;

Xc= 1/2πfC

Xc =1/2* 3.14 * 1 * 10^3 * (0.01 * 10^-6)

Xc = 15924 ohm

Then Z = √R^2 + Xc^2

Z = √(10 * 10^3) + (15924 )^2

Z = 18804 ohm

I = V/Z

I = 10V / 18804 ohm

I = 0.00053 A

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Answer:

The heat necessary to warm 500g of water from 20°C to 65°C is 37,620 J.

Explanation:

GIVEN: m = 500 gm, T₂ = 65°C AND T₁  = 20°C, we know that c (specific heat capacity) = 4180

TO FIND: The heat necessary to warm 500g of water from 20°C to 65°C.

SOLUTION:

By using the heat equation,

              Q=m c ΔT  

             ΔT = T₂ - T1

             ΔT = 65 - 20 = 45°C

In this case,

Q = 0.2 × 4180 × 45 = 37,620 J

Answer:

S=D/T

S=2340/3.5

S=668 km/hrs

Explanation:

Answer:

90 is the best it's reasonable time

An airplane must attain a speed of 480 feet per second to take off. Given that the airplane has a maximal acceleration of 12 feet per square second, we need to find out the length of the runway. We can use the formula s = ut + 1/2at² where s is the distance, u is the initial velocity.

A is the acceleration and t is the time taken to travel the distance. To determine the minimum length of the runway, we need to find the time taken to attain the speed of 480 feet per second. The initial velocity is zero. Using the formula v = u + at where v is the final velocity, u is the initial velocity, a is the acceleration and t is the time taken to attain the final velocity.

We have;480 = 0 + 12t=> t = 40s.Now we can determine the minimum length of the runway.s = ut + 1/2at²=> s = 0(40) + 1/2(12)(40)²=> s = 9600 feet,Therefore, the runway must be at least 9600 feet long to accommodate the airplane for takeoff. The above explanation has a total of 118 words.

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Answer:

2 moles of H2Nsuperscript(-) or NHsubscript2 , amide group!

I hope it will be useful.

Answer:

72 km / hour

Explanation:

Speed equals to distance over time. We are given distance equal 360 km and time in 5 hours.

Hence:

\(\displaystyle \large{s=\frac{360}{5}}\\\displaystyle \large{s=72}\)

Therefore, the speed is 72 km / hour.

Notes

Sometimes, speed is defined as ‘v’ while velocity is defined as ‘v vector’ indicating that velocity is speed with direction and speed is just velocity with only magnitude.

__________________________________________________________

The athlete's final speed, at an angle of 3.45° south of straight east, is around 24.34 m/s.

Add the time the item is being accelerated to the acceleration. For instance, if an item falls for three seconds, multiply three by the acceleration caused by gravity, or 9.8 metres per second squared. In this instance, the resulting velocity is 29.4 metres per second.

Athlete's velocity: vx = 23 m/s, vy = 0 (since the athlete is running due east)

Wind 1 velocity: vx1 = 10 cos(65°) ≈ 3.56 m/s, vy1 = 10 sin(65°) ≈ 9.10 m/s

Wind 2 velocity: vx2 = 8 cos(70°) ≈ -2.28 m/s, vy2 = -8 sin(70°) ≈ -7.61 m/s

The x-component of the resultant velocity is the sum of the x-components of the individual velocities:

vx = vx1 + vx2 + 23 m/s = 3.56 m/s - 2.28 m/s + 23 m/s = 24.28 m/s

vy = vy1 + vy2 = 9.10 m/s - 7.61 m/s = 1.49 m/s

|v| = √(vx² + vy²) = √((24.28 m/s)² + (1.49 m/s)²) ≈ 24.34 m/s

θ = atan(vy/vx) ≈ atan(1.49/24.28) ≈ 3.45°

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1.53 secs :)))))))))))))))

Answer:

The black lines represent the energy absorbed by the electrons.

Explanation:

Atoms emit lights when they are excited. These lights are of particular wavelengths that match with different colors. A series of colored lines appear along with spaces in the middle of the two colors. The middle of the colors is filled with dark spaces. Each spectral line of an element represents a specific characteristic of the element. These colored lines appearing in the form of series are termed to be the atomic spectrum of the element. Identification of the elements is done through the line of the spectrum they possess.

Answer:

(B) The black lines represent the energy absorbed by the electrons.

Explanation:

Answer:

8.6m/s2

Explanation:

cause im a boss

The gravitational force exerted by object can be determined from the universal gravitational law and it is obtained as 9.8 m/s² for earth. This is called acceleration due to gravity of earth.

The gravitational force is the force by which an object attracts other object into its center of mass. The gravitational force depends on the masses of the objects and distance between them by the equation written below:

Fg = G m1 m2/r²

where G is the universal gravitational constant equal to 6.67 × 10⁻¹¹ N/kg²m²

The mass of earth is given is given 6.1 × 10²⁴ kg

radius of earth  = 6.4 × 10⁶ m

The acceleration due to gravity g can be determined using the above expression.

then Fg = 6.67 × 10⁻¹¹ N × 6.1 × 10²⁴ kg/ (6.4 × 10⁶ m)² =  9.8 m/s²

Therefore, the surface gravity of earth is 9.8 m/s².

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The relationship between the speed and height of the three balls is that; each ball will have the same speed.

What is the relationship between speed and height?

We are given that;

Three balls are thrown from a cliff with same speed

Ball A is thrown in the horizontal direction.

Ball B starts out at 45° above the horizontal.

Ball C begins its flight at 45° below the horizontal

From law of conservation of energy, we know that potential energy is equal to kinetic energy. Thus;

mgh = ¹/₂mv²

v = √2gh

Therefore, the speed is directly proportional to the height and as such since the three balls have the same height, their speeds will be the same.

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[NOTE : THIS IS AN INCOMPLETE QUESTION. THE COMPLETE QUESTION IS:

Three balls are thrown off a cliff with the same speed but in different directions. Ball A is thrown in the horizontal direction; ball B starts out at 45° above the horizontal; ball C begins its flight at 45° below the horizontal. Which ball has the greatest speed just before it hits the ground? Assume that the ground near the building is level, and ignore any effects due to air resistance.]

Explanation:

Qualitative is to observe and note a quality about something - like the paper airplanes are made out of "white" paper. White is a qualitative property.

Quantitative is to observe and measure a value - like the time of flight of a paper airplane.

Answer:

hope it would be helpful

When the swinging cup of water comes to a halt, the water in the cup continues to move due to its own inertia. It sloshes back and forth until it comes to a stop as well.

When you swing a cup of water, it remains inside the cup because of the centrifugal force. When you stop swinging the cup of water, the water in the cup will continue to move due to its own inertia. The water will slosh back and forth until it comes to a stop as well. This motion is due to the force of inertia.

When you hold a cup of water and swing it, the water moves along with the cup. The water remains in the cup due to the centrifugal force which acts on it. The centrifugal force is an outward force that is exerted on an object moving in a circle. When you swing the cup of water, the force of the centrifugal force is greater than the force of gravity which would otherwise cause the water to spill out of the cup.When you stop swinging the cup of water, the centrifugal force is no longer present, but the water still has momentum and will continue to move due to its own inertia. The water will slosh back and forth until it comes to a stop as well. This motion is due to the force of inertia. Inertia is the property of matter that resists changes in its motion. When you swing the cup of water, you give it a certain amount of momentum. This momentum causes the water to continue to move even after you stop swinging the cup of water.

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Based on the information provided, we can determine that the object's acceleration is constant and equal to zero.

This is because the object is traveling the same distance in each second, indicating that its speed is constant. Acceleration is defined as the rate at which an object changes its velocity, and since the velocity of the object is not changing (it's constant), its acceleration is zero.

It's important to note that even though the object's acceleration is zero, it is still moving. This is because acceleration is only one aspect of an object's motion, and velocity and displacement are also important factors to consider. In this case, the object's displacement (total distance traveled) is 24 meters, and its velocity is constant.

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Answer:

speed

Explanation:

Newton's first law of motion:

An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

Magnitude of the force required to give the helicopter an acceleration of 0.10g upward is 0.981m N, where m is the mass of the helicopter in kilograms.

Physical quantity which causes or tends to cause a motion in any object at rest or changes or tends to change the direction of motion of a moving object or shape or size of object is called force.

Force required to give a helicopter of mass m an acceleration of 0.10g upward can be calculated using Newton's second law. Here, the acceleration is 0.10g, which can be expressed as:

a = 0.10g = 0.10 * 9.81 m/s² = 0.981 m/s²

F = ma

F = m * 0.981

Therefore, magnitude of the force required to give the helicopter an acceleration of 0.10g upward is 0.981m N, where m is the mass of the helicopter in kilograms.

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Answer:

imperial system

Explanation:

Answer:

british system

Explanation:

A P E X

Answer:

Vf = 15 m/s

Explanation:

First we consider the upward motion of ball to find the height reached by the ball. Using 3rd equation of motion:

2gh = Vf² - Vi²

where,

g = acceleration due to gravity = -9.8 m/s² (negative sign for upward motion)

h = height =?

Vf = Final Velocity = 0 m/s (Since, ball momentarily stops at highest point)

Vi = Initial Velocity = 15 m/s

Therefore,

2(-9.8 m/s²)h = (0 m/s)² - (15 m/s)²

h = (-225 m²/s²)/(-19.6 m/s²)

h = 11.47 m

Now, we consider downward motion:

2gh = Vf² - Vi²

where,

g = acceleration due to gravity = 9.8 m/s²

h = height = 11.47 m

Vf = Final Velocity = ?

Vi = Initial Velocity = 0 m/s

Therefore,

2(9.8 m/s²)(11.47 m) = Vf² - (0 m/s)²

Vf = √(224.812 m²/s²)

Vf = 15 m/s

Answer:

in physics, measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement.

Explanation:

The relationship between the two times is \(TE = TM\sqrt{\frac{gM}{gE} }\)

The given parameters:

the acceleration due to gravity on the Moon = gM

height from which the object was dropped on moon, =  H

time taken for the object to reach the moon surface, = TM

height from which the object was dropped on Earth, =  H

the acceleration due to gravity on the Earth = gE

time taken for the object to reach the Earth's surface = TE

To find:

Apply the following kinematic equation:

\(H = ut + \frac{1}{2} gt^2\\\\we \ know \ nothing \ about \ the \ initial \ velocity \ u , let \ u = 0\\\\H = \frac{1}{2} gt^2\\\\\)

Height equation for the object on the moon:

\(H = \frac{(gM) TM^2}{2}\)

Height equation for the object on the Earth:

\(H = \frac{(gE) TE^2}{2}\)

Since the two heights are equal, set the two equation to be equal to each other to determine the relationship between the two times:

\(\frac{(gE)TE^2}{2} = \frac{(gM)TM^2}{2} \\\\(gE)TE^2 = (gM)TM^2\\\\make \ TE \ the \ subject \ of \ the \ formula;\\\\ TE^2 = \frac{(gM)TM^2}{gE} \\\\TE= \sqrt{\frac{(gM)TM^2}{gE} } \\\\TE = TM\sqrt{\frac{gM}{gE} }\)

Thus, the relationship between the two times is \(TE = TM\sqrt{\frac{gM}{gE} }\)

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Answer:

D...............................

The displacement method can be used to determine the shark's volume by measuring the corresponding volume of the displaced water in the can.

If the object has an irregular shape , the volume can be measured using a displacement can.

The displacement can is filled with water above a narrow spout and allowed to drain until the water is level with the spout. As the irregular object is lowered into the displacement can, the water level rises.

The level of water displaced is the volume of the irregular shape.

Thus, the displacement method can be used to determine the shark's volume by measuring the corresponding volume of the displaced water in the can.

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Jadon and Sylvia will find that the tangential speed of the puck is 1.41 m/s. This can be calculated using the formula v = √(Tension / (mass * (radius^2))), where Tension is 2.0 N, mass is 0.5 kg, and radius is 0.7 m. Plugging in these values gives v = √(2.0 / (0.5 * (0.7^2))) = 1.41 m/s.

To find the tangential speed of the puck, we can follow these steps:
1. Identify the given values: mass (m) = 0.5 kg, tension (T) = 2.0 N, and radius (r) = 0.7 m.
2. Since tension acts as the centripetal force in this scenario, we can use the formula for centripetal force: Fc = (m * v^2) / r, where Fc is the centripetal force and v is the tangential speed.
3. Substitute the given values into the equation: 2.0 N = (0.5 kg * v^2) / 0.7 m.
4. Solve for v. First, multiply both sides of the equation by 0.7 m: 1.4 Nm = 0.5 kg * v^2.
5. Divide both sides of the equation by 0.5 kg: 2.8 m^2/s^2 = v^2.
6. Finally, take the square root of both sides to find the tangential speed: v = sqrt(2.8 m^2/s^2) ≈ 1.67 m/s.
So, Jadon and Sylvia will find the tangential speed of the puck to be approximately 1.67 m/s.

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The cocoa powder dissolves very quickly when she adds it to hot water as compared to cold water because The hot temperature and color of the powder increase the rate of dissolving.

When she adds cocoa powder to hot water as opposed to cold water with little stirring, she observes that the cocoa powder dissolves significantly more quickly. What causes this, in your opinion? 1) Cocoa powder functions in the water as a solute. 2) It melted as a result of the heat since hot water causes cocoa powder to dissolve more quickly when heated.

The rate of dissolving is very fast because the temperature of the warm water is high. Therefore the kinetic energy of water molecules high. So the molecules moves fast. Therefore the rate of dissolving increases.

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